/* base.css — Flow-AI design tokens, reset, and shared layout (header/footer/nav/buttons).
   Direction: "Sunlit Minimal" — warm paper surfaces, teal + gold accents, hairline dividers,
   Schibsted Grotesk / Figtree / JetBrains Mono. Light + dark mode via [data-theme]. */

:root {
  /* ---- surfaces & ink (light) — graphite ---- */
  --color-surface: #ffffff;
  --color-surface-2: #f2f3f3;
  --color-surface-offset: #f2f3f3;
  --color-divider: #e2e4e4;
  --color-border: #d3d6d6;
  --color-text: #22262a;
  --color-text-muted: #5c6266;
  --color-text-faint: #8a9094;

  /* ---- brand accent (light) — teal ---- */
  --color-primary: #0c6b64;
  --color-primary-hover: #0a5951;
  --color-primary-highlight: #d7ece7;
  --color-text-inverse: #ffffff;
  --color-accent: var(--color-primary);
  --color-accent-highlight: var(--color-primary-highlight);

  /* ---- status (light) ---- */
  --color-success: #2f8f5b;
  --color-error: #b3402c;
  --color-error-highlight: #f7e4de;

  --shadow-sm: 0 2px 6px rgba(20, 22, 24, 0.08);
  --shadow-lg: 0 12px 32px -8px rgba(20, 22, 24, 0.16), 0 4px 10px -4px rgba(20, 22, 24, 0.1);

  /* ---- type ---- */
  --font-display: 'Schibsted Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Figtree', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1.0625rem;
  --text-lg: 1.25rem;
  --text-xl: clamp(1.5rem, 1.3rem + 0.9vw, 1.75rem);
  --text-2xl: clamp(1.75rem, 1.4rem + 1.6vw, 2.25rem);
  --text-3xl: clamp(2.25rem, 1.6rem + 3vw, 3.25rem);

  /* ---- spacing (4px base) ---- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* ---- radius ---- */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 16px;
  --radius-full: 999px;

  --container-w: 1240px;
  --container-w-narrow: 760px;

  color-scheme: light;
}

[data-theme='dark'] {
  --color-surface: #17191b;
  --color-surface-2: #1f2224;
  --color-surface-offset: #1f2224;
  --color-divider: #2c3033;
  --color-border: #3a3f43;
  --color-text: #eef0f1;
  --color-text-muted: #9aa0a4;
  --color-text-faint: #6d7377;

  --color-primary: #5fc2b8;
  --color-primary-hover: #7ad4ca;
  --color-primary-highlight: #163330;
  --color-text-inverse: #0b1f1d;
  --color-accent: var(--color-primary);
  --color-accent-highlight: var(--color-primary-highlight);

  --color-success: #4caf7d;
  --color-error: #d97a63;
  --color-error-highlight: #3a231d;

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 12px 32px -8px rgba(0, 0, 0, 0.5), 0 4px 10px -4px rgba(0, 0, 0, 0.35);

  color-scheme: dark;
}

/* ---------- reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html,
body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  min-height: 100%;
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.6;
  background: var(--color-surface);
  color: var(--color-text);
  transition: background-color 200ms ease, color 200ms ease;
}
img,
svg {
  display: block;
  max-width: 100%;
}
ul[role='list'],
ul {
  list-style: none;
  padding: 0;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity 120ms ease-out;
}
a:hover {
  opacity: 0.72;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
::selection {
  background: var(--color-primary-highlight);
  color: var(--color-text);
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- type ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
h1 {
  font-size: var(--text-3xl);
  line-height: 1.08;
  letter-spacing: -0.025em;
}
h2 {
  font-size: var(--text-2xl);
  letter-spacing: -0.014em;
}
h3 {
  font-size: var(--text-lg);
  letter-spacing: -0.008em;
}
h4 {
  font-size: var(--text-sm);
  letter-spacing: 0.005em;
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
}
.lede {
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--color-text-muted);
}
.mono {
  font-family: var(--font-mono);
}

/* ---------- layout ---------- */
.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow {
  max-width: var(--container-w-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 200;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 700;
}
.skip-link:focus {
  top: var(--space-4);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--text-sm);
  white-space: nowrap;
  transition: transform 100ms ease-out, opacity 120ms ease-out, background-color 150ms ease;
}
.btn:hover {
  opacity: 0.88;
}
.btn:active {
  transform: scale(0.97);
}
@media (prefers-reduced-motion: reduce) {
  .btn:active {
    transform: none;
  }
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  opacity: 1;
}
.btn--ghost {
  border-bottom: 2px solid var(--color-accent);
  color: var(--color-text);
  border-radius: var(--radius-sm);
}
.icon-btn {
  width: 2.125rem;
  height: 2.125rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  flex-shrink: 0;
}
.icon-btn svg {
  width: 16px;
  height: 16px;
}

/* ---------- header (translucent material) ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in oklab, var(--color-surface) 72%, transparent);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
}
.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -14px;
  height: 14px;
  pointer-events: none;
  background: linear-gradient(to bottom, color-mix(in oklab, var(--color-surface) 55%, transparent), transparent);
}
@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--color-surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid var(--color-divider);
  }
  .site-header::after {
    display: none;
  }
}
@media (prefers-contrast: more) {
  .site-header {
    background: var(--color-surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid var(--color-text);
  }
  .site-header::after {
    display: none;
  }
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--color-text);
  flex-shrink: 0;
}
.brand svg {
  width: 30px;
  height: 30px;
  color: var(--color-text);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
  font-weight: 500;
}
.nav-links a {
  color: var(--color-text-muted);
}
.nav-links a[aria-current='page'] {
  color: var(--color-text);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.lang-toggle {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
}
.lang-toggle button {
  padding: 0.4375rem 0.6875rem;
  color: var(--color-text-muted);
}
.lang-toggle button[aria-pressed='true'] {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.mobile-nav-toggle {
  display: none;
}

@media (max-width: 880px) {
  .nav-links,
  .nav-actions .btn--primary {
    display: none;
  }
  .mobile-nav-toggle {
    display: inline-flex;
  }
}

.mobile-nav-drawer {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--color-surface);
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
  transform: translateX(100%);
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-nav-drawer[data-open='true'] {
  transform: translateX(0);
}
@media (prefers-reduced-motion: reduce) {
  .mobile-nav-drawer {
    transition: opacity 200ms ease;
    transform: none;
    opacity: 0;
    pointer-events: none;
  }
  .mobile-nav-drawer[data-open='true'] {
    opacity: 1;
    pointer-events: auto;
  }
}
.mobile-nav-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mobile-nav-drawer nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
}
.mobile-nav-drawer nav a {
  color: var(--color-text);
}
.mobile-nav-drawer nav a[aria-current='page'] {
  color: var(--color-primary);
}

/* ---------- CTA band ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  padding-block: var(--space-8);
  background: var(--color-primary);
}
.cta-band h2 {
  color: var(--color-text-inverse);
  font-size: var(--text-xl);
  max-width: 26ch;
}
.cta-band p {
  color: var(--color-text-inverse);
  opacity: 0.85;
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}
.cta-band .btn--primary {
  background: var(--color-text-inverse);
  color: var(--color-primary);
  flex-shrink: 0;
}
.cta-band .btn--primary:hover {
  background: var(--color-text-inverse);
  opacity: 0.88;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8) var(--space-6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-7);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
}
.footer-brand svg {
  width: 26px;
  height: 26px;
  color: var(--color-text);
}
.footer-col p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 32ch;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: var(--space-4);
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--text-sm);
}
.footer-col ul a {
  color: var(--color-text);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  letter-spacing: 0.01em;
  color: var(--color-text-muted);
}

@media (max-width: 700px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }
}